he's killing officers that have nothing to do with his issue with lapd. that makes it much more difficult. we both know the number of patrol officers moving around are all fair game. that's the most serious concern and immediate problem for law enforcement. >> and how long could this take? could this drag out for most of the day? the days to come? >> no, well, i don't know. if he goes into hiding, it will take longer. if he continues do this until he gets killed, it could go on for a few more hours. >> how concerned should the community be? >> as a whole, not concerned. if you're in law enforcement and in uniform, be very concerned. >> all right, brad garrett, appreciate it. we'll keep you updated throughout the day. >>> now to the big headline overnight on lance armstrong. just hours before the deadline that would have meant he was banned for siblging for life, armstrong will cooperate now with the anti-doping investigation. here's neal karlinsky. >> reporter: he's not man who scarce easily. apparently he does fear jail. that may have been the motivator